Stair Rise Calc
Answer Worked out from a total rise of 96.00 inches, floor to floor.

Deck stair calculator

Deck height96in96.00 in8 ft
Total rise
96in96.00 in8 ft
Risers
14
Riser height
67/8in
Stairs from a deck 96.00 inches above the ground: 14 risers, a 36.0 inch landing pad at the foot, 143.00 inches of total run and a stringer measuring 172.235 inches. Deck height96 in Total run143 in Landing pad36 in Stringer length1721⁄4 in
Given

What this was worked out from

These are the figures every number on this page is worked for.

Solution

Every dimension of this flight

To the nearest sixteenth
Total rise
96in96.00 in8 ft
Risers
14
Riser height
67/8in6.857 in
Treads
13
Tread run
11in11.000 in
Total run
143in143.000 in11 ft 11 in
One step along the edge
1215/16in12.962 in
Marked length
1811/2in181.472 in15 ft 1.47 in
Stringer length
1721/4in172.235 in14 ft 4.24 in
Board length
16ft
Angle
31.9°
Stringer angle
33.9°
2 risers + 1 tread
2411/16in24.71 in2 ft 0.71 in
Bottom cut deduction
1in1.000 in
Tread thickness
1in1.00 in
Nosing
1in1.00 in
Stair width
36in36.00 in3 ft
Options

The stringers and the pad under them

Stringers
4
Stringer spacing
16in
Landing pad
36in

The spacing is the one you entered. No maximum is claimed until a source states one.

Code

Each figure against the limit it has to meet

Dimension Limit Code Result
Riser height, maximum 73/4in IRC 2021 (residential) Within
Tread depth, minimum 10in IRC 2021 (residential) Within
Stair width, minimum 36in IRC 2021 (residential) Within
Riser height, minimum 4in ADA 2010504.2 Within
Riser height, maximum 7in ADA 2010504.2 Within
Tread depth, minimum 11in ADA 2010504.2 Within
Nosing projection, maximum 11/2in ADA 2010504.5 Within
Calculators

Work out one part on its own

Source

Where the limits come from

2 sources, with the date each was read

Building codes are adopted and amended locally. Confirm every figure with the code your jurisdiction has adopted before you cut.

Updated September 2026